1// SPDX-License-Identifier: GPL-2.0
2#include <linux/proc_fs.h>
3#include <linux/ethtool.h>
4#include <linux/export.h>
5#include <net/net_namespace.h>
6#include <net/netns/generic.h>
7#include <net/bonding.h>
8
9#include "bonding_priv.h"
10
11static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
12	__acquires(RCU)
13{
14	struct bonding *bond = pde_data(file_inode(seq->file));
15	struct list_head *iter;
16	struct slave *slave;
17	loff_t off = 0;
18
19	rcu_read_lock();
20
21	if (*pos == 0)
22		return SEQ_START_TOKEN;
23
24	bond_for_each_slave_rcu(bond, slave, iter)
25		if (++off == *pos)
26			return slave;
27
28	return NULL;
29}
30
31static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
32{
33	struct bonding *bond = pde_data(file_inode(seq->file));
34	struct list_head *iter;
35	struct slave *slave;
36	bool found = false;
37
38	++*pos;
39	if (v == SEQ_START_TOKEN)
40		return bond_first_slave_rcu(bond);
41
42	bond_for_each_slave_rcu(bond, slave, iter) {
43		if (found)
44			return slave;
45		if (slave == v)
46			found = true;
47	}
48
49	return NULL;
50}
51
52static void bond_info_seq_stop(struct seq_file *seq, void *v)
53	__releases(RCU)
54{
55	rcu_read_unlock();
56}
57
58static void bond_info_show_master(struct seq_file *seq)
59{
60	struct bonding *bond = pde_data(file_inode(seq->file));
61	const struct bond_opt_value *optval;
62	struct slave *curr, *primary;
63	int i;
64
65	curr = rcu_dereference(bond->curr_active_slave);
66
67	seq_printf(seq, "Bonding Mode: %s",
68		   bond_mode_name(BOND_MODE(bond)));
69
70	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
71	    bond->params.fail_over_mac) {
72		optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
73					  bond->params.fail_over_mac);
74		seq_printf(seq, " (fail_over_mac %s)", optval->string);
75	}
76
77	seq_printf(seq, "\n");
78
79	if (bond_mode_uses_xmit_hash(bond)) {
80		optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
81					  bond->params.xmit_policy);
82		seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
83			   optval->string, bond->params.xmit_policy);
84	}
85
86	if (bond_uses_primary(bond)) {
87		primary = rcu_dereference(bond->primary_slave);
88		seq_printf(seq, "Primary Slave: %s",
89			   primary ? primary->dev->name : "None");
90		if (primary) {
91			optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
92						  bond->params.primary_reselect);
93			seq_printf(seq, " (primary_reselect %s)",
94				   optval->string);
95		}
96
97		seq_printf(seq, "\nCurrently Active Slave: %s\n",
98			   (curr) ? curr->dev->name : "None");
99	}
100
101	seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
102		   "up" : "down");
103	seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
104	seq_printf(seq, "Up Delay (ms): %d\n",
105		   bond->params.updelay * bond->params.miimon);
106	seq_printf(seq, "Down Delay (ms): %d\n",
107		   bond->params.downdelay * bond->params.miimon);
108	seq_printf(seq, "Peer Notification Delay (ms): %d\n",
109		   bond->params.peer_notif_delay * bond->params.miimon);
110
111
112	/* ARP information */
113	if (bond->params.arp_interval > 0) {
114		int printed = 0;
115
116		seq_printf(seq, "ARP Polling Interval (ms): %d\n",
117				bond->params.arp_interval);
118		seq_printf(seq, "ARP Missed Max: %u\n",
119				bond->params.missed_max);
120
121		seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
122
123		for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
124			if (!bond->params.arp_targets[i])
125				break;
126			if (printed)
127				seq_printf(seq, ",");
128			seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
129			printed = 1;
130		}
131		seq_printf(seq, "\n");
132
133#if IS_ENABLED(CONFIG_IPV6)
134		printed = 0;
135		seq_printf(seq, "NS IPv6 target/s (xx::xx form):");
136
137		for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) {
138			if (ipv6_addr_any(&bond->params.ns_targets[i]))
139				break;
140			if (printed)
141				seq_printf(seq, ",");
142			seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]);
143			printed = 1;
144		}
145		seq_printf(seq, "\n");
146#endif
147	}
148
149	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
150		struct ad_info ad_info;
151
152		seq_puts(seq, "\n802.3ad info\n");
153		seq_printf(seq, "LACP active: %s\n",
154			   (bond->params.lacp_active) ? "on" : "off");
155		seq_printf(seq, "LACP rate: %s\n",
156			   (bond->params.lacp_fast) ? "fast" : "slow");
157		seq_printf(seq, "Min links: %d\n", bond->params.min_links);
158		optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
159					  bond->params.ad_select);
160		seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
161			   optval->string);
162		if (capable(CAP_NET_ADMIN)) {
163			seq_printf(seq, "System priority: %d\n",
164				   BOND_AD_INFO(bond).system.sys_priority);
165			seq_printf(seq, "System MAC address: %pM\n",
166				   &BOND_AD_INFO(bond).system.sys_mac_addr);
167
168			if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
169				seq_printf(seq,
170					   "bond %s has no active aggregator\n",
171					   bond->dev->name);
172			} else {
173				seq_printf(seq, "Active Aggregator Info:\n");
174
175				seq_printf(seq, "\tAggregator ID: %d\n",
176					   ad_info.aggregator_id);
177				seq_printf(seq, "\tNumber of ports: %d\n",
178					   ad_info.ports);
179				seq_printf(seq, "\tActor Key: %d\n",
180					   ad_info.actor_key);
181				seq_printf(seq, "\tPartner Key: %d\n",
182					   ad_info.partner_key);
183				seq_printf(seq, "\tPartner Mac Address: %pM\n",
184					   ad_info.partner_system);
185			}
186		}
187	}
188}
189
190static void bond_info_show_slave(struct seq_file *seq,
191				 const struct slave *slave)
192{
193	struct bonding *bond = pde_data(file_inode(seq->file));
194
195	seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
196	seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
197	if (slave->speed == SPEED_UNKNOWN)
198		seq_printf(seq, "Speed: %s\n", "Unknown");
199	else
200		seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
201
202	if (slave->duplex == DUPLEX_UNKNOWN)
203		seq_printf(seq, "Duplex: %s\n", "Unknown");
204	else
205		seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
206
207	seq_printf(seq, "Link Failure Count: %u\n",
208		   slave->link_failure_count);
209
210	seq_printf(seq, "Permanent HW addr: %*phC\n",
211		   slave->dev->addr_len, slave->perm_hwaddr);
212	seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
213
214	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
215		const struct port *port = &SLAVE_AD_INFO(slave)->port;
216		const struct aggregator *agg = port->aggregator;
217
218		if (agg) {
219			seq_printf(seq, "Aggregator ID: %d\n",
220				   agg->aggregator_identifier);
221			seq_printf(seq, "Actor Churn State: %s\n",
222				   bond_3ad_churn_desc(port->sm_churn_actor_state));
223			seq_printf(seq, "Partner Churn State: %s\n",
224				   bond_3ad_churn_desc(port->sm_churn_partner_state));
225			seq_printf(seq, "Actor Churned Count: %d\n",
226				   port->churn_actor_count);
227			seq_printf(seq, "Partner Churned Count: %d\n",
228				   port->churn_partner_count);
229
230			if (capable(CAP_NET_ADMIN)) {
231				seq_puts(seq, "details actor lacp pdu:\n");
232				seq_printf(seq, "    system priority: %d\n",
233					   port->actor_system_priority);
234				seq_printf(seq, "    system mac address: %pM\n",
235					   &port->actor_system);
236				seq_printf(seq, "    port key: %d\n",
237					   port->actor_oper_port_key);
238				seq_printf(seq, "    port priority: %d\n",
239					   port->actor_port_priority);
240				seq_printf(seq, "    port number: %d\n",
241					   port->actor_port_number);
242				seq_printf(seq, "    port state: %d\n",
243					   port->actor_oper_port_state);
244
245				seq_puts(seq, "details partner lacp pdu:\n");
246				seq_printf(seq, "    system priority: %d\n",
247					   port->partner_oper.system_priority);
248				seq_printf(seq, "    system mac address: %pM\n",
249					   &port->partner_oper.system);
250				seq_printf(seq, "    oper key: %d\n",
251					   port->partner_oper.key);
252				seq_printf(seq, "    port priority: %d\n",
253					   port->partner_oper.port_priority);
254				seq_printf(seq, "    port number: %d\n",
255					   port->partner_oper.port_number);
256				seq_printf(seq, "    port state: %d\n",
257					   port->partner_oper.port_state);
258			}
259		} else {
260			seq_puts(seq, "Aggregator ID: N/A\n");
261		}
262	}
263}
264
265static int bond_info_seq_show(struct seq_file *seq, void *v)
266{
267	if (v == SEQ_START_TOKEN) {
268		seq_printf(seq, "%s\n", bond_version);
269		bond_info_show_master(seq);
270	} else
271		bond_info_show_slave(seq, v);
272
273	return 0;
274}
275
276static const struct seq_operations bond_info_seq_ops = {
277	.start = bond_info_seq_start,
278	.next  = bond_info_seq_next,
279	.stop  = bond_info_seq_stop,
280	.show  = bond_info_seq_show,
281};
282
283void bond_create_proc_entry(struct bonding *bond)
284{
285	struct net_device *bond_dev = bond->dev;
286	struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
287
288	if (bn->proc_dir) {
289		bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
290				bn->proc_dir, &bond_info_seq_ops, bond);
291		if (bond->proc_entry == NULL)
292			netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
293				    DRV_NAME, bond_dev->name);
294		else
295			memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
296	}
297}
298
299void bond_remove_proc_entry(struct bonding *bond)
300{
301	struct net_device *bond_dev = bond->dev;
302	struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
303
304	if (bn->proc_dir && bond->proc_entry) {
305		remove_proc_entry(bond->proc_file_name, bn->proc_dir);
306		memset(bond->proc_file_name, 0, IFNAMSIZ);
307		bond->proc_entry = NULL;
308	}
309}
310
311/* Create the bonding directory under /proc/net, if doesn't exist yet.
312 * Caller must hold rtnl_lock.
313 */
314void __net_init bond_create_proc_dir(struct bond_net *bn)
315{
316	if (!bn->proc_dir) {
317		bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
318		if (!bn->proc_dir)
319			pr_warn("Warning: Cannot create /proc/net/%s\n",
320				DRV_NAME);
321	}
322}
323
324/* Destroy the bonding directory under /proc/net, if empty.
325 */
326void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
327{
328	if (bn->proc_dir) {
329		remove_proc_entry(DRV_NAME, bn->net->proc_net);
330		bn->proc_dir = NULL;
331	}
332}
333